20630606 has 4 divisors (see below), whose sum is σ = 30945912. Its totient is φ = 10315302.

The previous prime is 20630587. The next prime is 20630611. The reversal of 20630606 is 60603602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60603602 = 2 ⋅30301801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5157650 + ... + 5157653.

It is an arithmetic number, because the mean of its divisors is an integer number (7736478).

Almost surely, 2^20630606 is an apocalyptic number.

20630606 is a deficient number, since it is larger than the sum of its proper divisors (10315306).

20630606 is a wasteful number, since it uses less digits than its factorization.

20630606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10315305.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20630606 is about 4542.0926894990. The cubic root of 20630606 is about 274.2651720985.

The spelling of 20630606 in words is "twenty million, six hundred thirty thousand, six hundred six".